This particular group of plants with a very dark corolla throat from around the Del Mar area seem intermediate between what I've called ssp. leptantha and ssp. hamata. Some edge one way, some edge another, but all seem to have fairly consistent corolla coloration. Perhaps an undescribed subspecies?
vouchered by Dean Wm. Taylor 17111 (JEPS101678); originally determined as N. jaredii, annotated 7/24/2003 to Navarretia nigelliformis E. Greene ssp. radians (J. Howell) Day